Cardboard carton



FIG. 1 is a perspective view showing the top, front and right side of a cardboard carton showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a left side thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 if a bottom view thereof.

FIG. 1 is on an enlarged scale. 

The ormamental design for a cardboard carton, as shown and described. 